<template>
    <div>
        <!-- 顶部 -->
        <div id="slider" class="mui-slider">
			<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
				<div class="mui-scroll">
					<a :class="['mui-control-item',item.id==0? 'mui-active' : '']"  href="#item1mobile" data-wid="tab-top-subpage-1.html" @click="getPhotoListByCateId(item.id)" v-for="item in cates" :key="item.id" >
						{{item.title}}
					</a>
				</div>
			</div>
		</div>

        <!-- 图片列表区域 -->
        <ul class="photo-list">
            <router-link v-for="item in list" :key="item.id" :to="'/home/photoinfo/'+item.id" tag='li'>
                <img v-lazy="item.img_url">
                <div class="info">
                    <h1 class="info-title">{{item.title}}</h1>
                    <div class="info-body">{{item.zhaiyao}}</div>
                </div>
            </router-link>
        </ul>

    </div>
</template>
<script>
//1.导入MUI的js文件
import mui from '../../lib/mui/js/mui.min.js';

import {Toast} from 'mint-ui'

export default {
    data(){
        return{
            cates:[],//所有分类的列表数组
            list:[]//所有图片的数组
        }
    },
    created(){
        this.getAllCategory();
        //默认进入页面 就主动请求所有图片列表的数据
        this.getPhotoListByCateId(0);
    },
    mounted(){//当组件总的dom结构被渲染好放到页面中时，会执行这个钩子函数
        //2.初始化 滑动控件
        mui('.mui-scroll-wrapper').scroll({
            deceleration:0.0005//flick 减速系数 ，系数越大，滚动越慢，滚动距离越小，默认值0.0006
        });
    },
    methods:{
        getAllCategory(){//获取所有图片分类
            this.$http.get('api/getimgcategory').then(result => {
                if(result.body.status === 0){
                    result.body.message.unshift({title:'全部',id:0});
                    this.cates = result.body.message;
                }else{
                   Toast("加载列表失败！"); 
                }
            })

        },
        getPhotoListByCateId(cateId){//根据分类id获取图片列表
            this.$http.get("api/getimages/"+cateId).then(result => {
                if(result.body.status === 0){
                    this.list = result.body.message;
                }else{
                    Toast("加载图片失败！"); 
                }
            })
            
        }
    }
}
</script>
<style lang="scss" scoped>
     * { touch-action: pan-y; } //解决滑动时报错的问题【百度】

    .photo-list{
        margin: 0;
        padding: 10px;
        padding-bottom: 0;
        li{
            margin-bottom: 10px;
            list-style: none;
            background: #ccc;
            text-align: center;
            box-shadow: 0 0 9px #999; 
            position: relative;           
            img{
                width: 100%;
                vertical-align: middle;
            }
            img[lazy='loading']{
                width: 40px;
                 height: 300px;
                margin: auto;
            }

            .info{
                color: #fff;
                text-align: left;
                position: absolute;
                bottom: 0;
                background: rgba(0,0,0,0.4);
                max-height: 84px;
                .info-title{
                    font-size: 14px;
                }
                .info-body{
                    font-size: 13px;
                }
            }
        }
    }
     
</style>

